121012020102020 has 96 divisors (see below), whose sum is σ = 276969535920000. Its totient is φ = 44236682800128.

The previous prime is 121012020102013. The next prime is 121012020102109. The reversal of 121012020102020 is 20201020210121.

It is a junction number, because it is equal to n+sod(n) for n = 121012020101986 and 121012020102004.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7578371 + ... + 17304789.

It is an arithmetic number, because the mean of its divisors is an integer number (2885099332500).

Almost surely, 2^{121012020102020} is an apocalyptic number.

121012020102020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121012020102020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138484767960000).

121012020102020 is an abundant number, since it is smaller than the sum of its proper divisors (155957515817980).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121012020102020 is a wasteful number, since it uses less digits than its factorization.

121012020102020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9727605 (or 9727603 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 121012020102020 its reverse (20201020210121), we get a palindrome (141213040312141).

The spelling of 121012020102020 in words is "one hundred twenty-one trillion, twelve billion, twenty million, one hundred two thousand, twenty".